Appearance of a quark matter phase in hybrid stars

14th International Conference on Strangeness in Quark Matter

Endo, Tomoki^1

Division of Physics, Department of General Education, Kagawa National Colledge of Technology, 355 Chokushi-cho, Kagawa 761-8058 Takamatsu, Japan^1

关键词: Central density;    Compact stars;    Equation of state;    Exotic phasis;    Finite size effect;    Inner region;    Nuclear matters;    Theoretical study;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/509/1/012075/pdf
DOI  :  10.1088/1742-6596/509/1/012075

来源: IOP

【 摘 要 】

The appearance of quark matter in the core of hybrid stars is a fundamental issue in such compact stars. The central density of these stars is sufficiently high such that nuclear matter undergoes a further change into other exotic phases that consist of hyperons and quarks. However, the equation of state (EOS) for the high-density matter is still not clear and several recent observations have indicated the limitations of the EOSs; theoretical studies should try to elucidate the EOSs. It is believed that the inner regions of the stars should consist of a mixed hadron-quark phase. We study the mixed hadron-quark phase, taking into account finite-size effects, and find that that the mixed phase should be restricted to a narrower region. Therefore, a quark matter phase should appear in the central region.